On the subgenus Eurysunius Reitter of Turkey VII. Four new species from central Anatolia, and additional records (Coleoptera: Staphylinidae: Paederinae, Astenus)
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In the study, four new species of Astenus (Eurysunius) Dejean (Coleoptera: Staphylinidae: Paederinae) are described and illustrated from central Anatolia, in Turkey, and distinguished from related consubgeners: Astenus veyseli Anlas, sp. n. (Sivas province), A. gultekini Anlas, sp. n. (Kirikkale province), A. kirani Anlas, sp. n. (Sivas province) and A. neseti Anlas, sp. n. (Kirsehir province). A key to Turkish species of Eurysunius is provided. The distributions of 22 species in Turkey are mapped. The subgenus Eurysunius was erected by Reitter (1909). It belongs to the genus Astenus Dejean (Coleoptera: Staphylinidae: Paederinae). The subgenus is so far known only from the Palaearctic region, ranging from Japan and South Korea to Canary Islands. To date, 64 species have been described in this subgenus, 63 of them occur in the Western Palaearctic and only one species is known from Japan and South Korea (Schulke & Smetana, 2015; Assing, 2015; Anlas, 2019). The vast majority of the species was recorded from Mediterranean countries. These species are distributed in Turkey (18 species), Spain (18 species), Italy (seven species), Morocco (seven species), Greece (five species), France (four species), Portugal (three species), Israel (two species), Algeria (one species) and Lebanon (one species). In Turkey, 17 of 18 species are endemic to this country (Anlas, 2019). Considering that none of the species was known prior to 2002, it seems likely that the diversity of Eurysunius in Turkey is far greater than currently known. The vast majority of Eurysunius species in Turkey are known from altitudes between 1500-2500 meters and most of